Oven, hot plate, bain-marie, and the like



Jan. 8 1924.

E. CLEARY 0vEN, HOT PLATE, BAIN MARIE, AND THE LIKE Filed May 12 1922' 4 Sheets-Sheetv yl Jan. s, 1924.v 1,480,505

E.v CLEARY OVEN, HOT PLATE, BAIN MARIE, AND THE LIKE Filed May 12, 1922 4 Sheets-Sheet 2 Jan. s, 1924. I 1,480,505

E. CLEARY OVEN, HOT- PLATE, BAIN MARIE, AND THE LKE 4Filed May l2. 1922 4 Sheets-Sheet 5 Jan. 8, 1924.

E. CLEARY l OVEN, HOT PLATE, BAIN MARIE, AND THE LIKE Filed May 12, i922 4 Sheets-Sheet 'L aro Patented dan. 8, 19724.

UNITED STATES EDWIN CLEARY,` or LONDON, ENGLAND; ALFRED HU GAIISON eerrererieebe- 0F SAIDV nDvJfrN CLEABY, Deen/Asian,

' ovEN, HOT PLATE, BArN-MAaIE, AND THELIKE.

l Application eiealyrey 12, 1 9'22. 'iseriaiNa 5ee,35q2.`

To 'zo/rop?, :it may concern.' l

Be it known that L'EDWIN CmARY, a citizen of the United like, 'of which the following is a specification.

This invention relates toi ovens, cookers', hot plates, bains marie,l and thelike, chieflyl designed for domestic use and` more especially adapted to, be heated''by petroleum stoves, gas burners andthe'like.

According to the inventioiifthe oveneomfV prises an inner casing or oven chamber munted in` an outer Casing .Se folleeve an intermediate n'spaeeb' t'vveenthe casings,

the otercasing being providedatiits'ilOvver` iena-wia an ine @temeer @hehe ase from eburner', eetl et its uppel Pfiffj ffl Qu 01 'merle "Oltlets 'for 'the' eoled'eeees Avete/1*- beth arranged i111 thu'ppel @i-'reef the intermediate. space t'oininunifcates;` the exterior'through holes `inthe Vtop plate of the youter casing,"'and a'circ'ulation pipe has Y.its ends in'communication with ithe IlterQr O'f the Wetertiel" uid itel'ds iet/9 the part Off-he litermdate Spa 'between the bottomvvallspof the4casingsf.v

AThe circulation pipeis advantageously mede '11.1 the IHI 0f e 10010, ilaOfCOi extending around the hot gas inlet aperture in the bottom vvall of thebutereasing, one vertical lirrib` of the circulation pipe being made .of meerdiameter.fhaqfhe'othea so as to induce a circulation vvof tvater vin the system. e Y' f The top vand bottom walls of the outer A@eine may be edvenfegosly' made "ii/ith flanges iit'ting over v`side I 'tvalls'i of such casing and be held in'p'sition byv bolts or the like. MoreoverA thefpart of the bottom Wall' of the'inner'casing or oven chamber opposite the inlet fri'the hot gases is'suitably protected, for exain'pleby'meansof a disc of cast`iron vsecured-"to its'underside.

If desired, a plurality` of'myv improved ovensfinay be arranged sideby sidevvith their hotgas orintermediate spaces in coinmunication with eachother, means such'a's sliding doors orfdampers beingprovided Vfor closing one' or more of `thefhotgas`-inlet apertures of such ovens, in faccor'dancewith the'number ofbiirners required ,for produc- States of America, residing at London, England,'have invented i new and useful Improvements Relatingto: Ovens, Het Plates, BainsMarie, 'and the Patent No. 1,381,080.

. Theraccompanying drawings` showA the invention may be conveniently andfid* Vantageosly carried these drawings;

intof pr'actiee. "Figure l front*elevation,

the casings en all'sides except at'theffrnt T'hefinternaleasing or `hzgtmber A ofthe 'Y Where the doorlC "is `"arranged.""Tlie outer casing BVv hasan aperture D'inits"'fbottom B to admitfthe aine'from a/petrol'euin or gas b urner, e. g. such asthat described inV ythe speeiiication of my' formeifLetters `The hot gases pass :fromv the interior of the hollow V'bottom up they spaces` betvveen the inner and outer casings A, 'B intorthe space abovethe inner casing beneath avvatefr tank Ewhich Yfills the major peatn' of the spacebet'tveen the upper Walls or`t`op plates of' the inner and outer casings and: may advantageously -be 'formedl of 1" galvanized sheet iron.' From "this space, up la space F at the'front oftlievvatertak and' out to the eXterir'throughy apertures G', "G formed'in the upper perror the' from thegases 'pas-s 'o vvall H ofthe outer casing' above the'dor` Y YThese outlet apertures are covered by 'screens JQJ-'of vvire gauze', perforated metaldiythg like.' j" f n een.,

' The Water tank is'openyat the' top 1-,0V the the upper vv'all or top fplzatesl Tof 'the outer receive the 'body of a'suit'ably" shaped saucepan, steamer, or other colking A'vessel"L, 'a kettle', forv the `like,"rl servingto allow: the sfteamfrom the vvatertank'to'ect directly on Vand heat the underside'of a 'coolingorether vesselpla'ced on the upper Wallf B","vvhicl1 thus forms a hot plate. IWThe"funderside"of the top plateB is provided With"streg2t-hening ribs or the like to enable it tesustain the weight of the cooking vessels, kettles, ory other objects to be heated thereon. The said cooking vessels, kettles, or the like are preferably made so as to fit closely in or lover the apertures K, K so as to prevent escape of the steam from `the water in the tank. Moreover, the apertures in this plate are preferably provided with strengthening rings or ribs M, M to enable them to resistJ wear. FromV the bett-om or the water tank a copper or other ysuitable metal pipe N extends down one ot the spaces between the vertical walls ot the inner and outer casings, preferably the'space between the rear walls, into the space between the bottoms of the casings and is extended by a similar pipe N of smaller' diameter into a loop arranged around the aperture D in the bottoni ot the outer casing. The other end of this pipe N" extends up through e. the saine backspace between the two casings and communicates with the interior or the tank E. By making the vertical limb N of the pipe of larger diameter than the other part N ot the pipe, a circulation ot water is induced in` the system. In order to prevent spurting upwards of the.v hot water from the circula tionpipe N', a baffle O is arranged inthe tank E above the outlet of this pipe. A. pipe 2 lextends Jfrom the lowest point of the pipe Nto an external tap 1 8, whereby thewater can be readily drawnotlt from the tank'E and circulation vpipes N, N when required. ln order to vary the temperature in the oven, holes P, P' are formed in theupper wall ortop plate A and a similarly perfora-ted strip Q is arrangedto slide so as to bring the holes R, B therein into and out of register with the holes P, P a part of the strip extending to the exterior where it is provided with an operating` handle Q. By this means the hot airin the interior of the oven Vchamber may be Vallowed to escape into the intermediate space'and allow cool air to enter from the exterior.

The door C has a window S' of glass, mica or other suitable material to enable the contents of the oven to be -obserifedtrom the exterior. y

QT he door C- is hinged at C and is retained in its closed position, e. g. byrmeans otcurved springs arranged near t1 e top and engaging,T behind 'fixed projections on the roven, the springs yielding when the door'is opened and closed. Moreover a thermometer T is provided in the interior of the oven'chamber and is arranged so that its vscale is visible from the exterior through the window S in order to enable the tem perature of the ovento be controlled in accordance' with the food to be cooked. A list of temperatures suitable for different foods may be provided on the exterior of the oven.V .I

The top and bottom walls or plates B', B

ol' Ithe outerrcasing are made with flanges V, V sliding' over the side walls B ot this casing, so as to enable the interior of the spaces between the casings to be exposed for cleaning", inspection, etc. These top and bottoni walls may be held in position by means of bolts lV, extendinga through the spaces between the two casings.

The door C, the interior casing A, and the shelves Y, Y therein may be advantageously inade'or aluminium or aluminium alloy andthe bottoni or underside wall ci" such interior casing be advantageously protected at the theV burner impinges on it. For example, it may-have a disc Z ot .cast iron or other4 heat resistant metal secured kto its under. side, e. g. by bolts or rivets. The outer casing may advantageously be formed ot sheet iron, e. g. charcoal iron.V A f f The oven isv provided ith suitable feet orlegs l, lsecured e. g.k by bolts to the bottom plate of the outer casing What I claim is:

l. A` cooking apparatus comprising an,

oven-chamber, a door to said chamber, an outer casing surrounding said chamber so as to leave an intermediate space aroundthe oven-chamber, said youter casing havingxa hot-gas inlet-aperture in its bottom andan outlet at its upper part for thecooled gases, a water bath extending to the top of the intermediate space. and which, communicates with the exterior through holes in the'top 100 ends of which communicate with` the y plate of the outer casing, and ay circulation pipe the interior of the water tank andwhich extends into the part of the intermediate space between the oven-chamber `and the bottom of the outer casing where it isformedvinto a loop arranged around the Vhot-,eas inlet-aperture, one vertical limb of said pipe beineV of larger diameter than ythe other.

place where the iiaine Yfrom.

2. A cooking apparatus comprising an' inner casing forming an ovenchan iber, a door tosaid chamber, an outer casing surroundingrthe vertical sides of said inner chamber except that containing the door.`

and also .enclosing the bottom wall of the oven-chamber, an intermediate space beingV left between said casings and the bottom wall Vof the outer casing having a hot-gasinletaperture, the lower wall of the oven chamber havingA a reinforcement opposite. said hoti gas inlet-aperture, thek outer casing having a top plate provided with an opening, a

.wa-terr tank communicating with theexterior through said opening in the top plate of thev outerA casing and which Y. is arranged at a short distance above the oven-chamber so as to leave an intermediate space in communication with theintermediate space be` tween the inner and outer casings, the coiniis,

izo

bined intermediate space having a gas outlet,

and a circulation pipe the ends of which communicate with the interior of the Water tank and which extends. entirely through the intermediate space into the part of the intermediate space between the oven-chamber and the bottom of the outer easing, one vertical limb of such pipe being of larger diameter than the other.

34A cooking apparatus comprising lan inner easing forming an oven-ehamber, a door for said chamber, an outer easing surrounding said inner chamber so as to leave an intermediate space between said easings, said outer casing having a hot-gas inlet aperture in its bottom and a gas outlet from said intermediate space, separate top and bottom walls for said outer casing having flanges for embracing side Walls of said easing, means for detaehably holding said the top Wall 'of the outer oarsng,vand a cirl 25 eulation pipe of-'WhichV the ends communicate with the interiorof the water tank and which extends entirely through the inter-v mediatespacebetween the oven-chamber and j j the bottom of the outer casing, one vertical limb of said pipe being of larger diameter 30 than the other. Y

K EDWIN 'CLEARY Witnesses:

Y CONRAD ARNOLD,

CHAS F. MURPHY. 1 

